3v4l.org

run code in 200+ php & hhvm versions
Bugs & Features
<?php $s = '12345'; $s[$s[1]] = '2'; echo $s;
Output for 4.3.0 - 5.6.30, hhvm-3.10.1 - 3.17.3, 7.0.0 - 7.2.0
12245